As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK, LG INDICATION THAT NOSE GEAR WAS NOT UP & RETRACTED. SOUNDED LIKE NORMAL RETRACTION WITH NO ABNORMAL WIND OR DRAG NOISE. PERFORMANCE SEEMED AS IF NOSE GEAR WAS RETRACTED. R & R NOSE GEAR LOCK PROX SWITCH PC CARD IAW AMM.